JP2007298986A - Image fixing unit - Google Patents

Image fixing unit Download PDF

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Publication number
JP2007298986A
JP2007298986A JP2007114471A JP2007114471A JP2007298986A JP 2007298986 A JP2007298986 A JP 2007298986A JP 2007114471 A JP2007114471 A JP 2007114471A JP 2007114471 A JP2007114471 A JP 2007114471A JP 2007298986 A JP2007298986 A JP 2007298986A
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Prior art keywords
heating roller
conductive layer
metal conductive
fixing device
pressure roller
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JP2007114471A
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Japanese (ja)
Inventor
Yoshinori Tsueda
義徳 杖田
Osamu Takagi
修 高木
Satoshi Kinouchi
聡 木野内
Hisahiro Sone
寿浩 曽根
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Toshiba Corp
Toshiba TEC Corp
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Toshiba Corp
Toshiba TEC Corp
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Publication of JP2007298986A publication Critical patent/JP2007298986A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0802—Arrangements for agitating or circulating developer material
    • G03G2215/0816—Agitator type
    • G03G2215/0819—Agitator type two or more agitators
    • G03G2215/0822—Agitator type two or more agitators with wall or blade between agitators
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0802—Arrangements for agitating or circulating developer material
    • G03G2215/0816—Agitator type
    • G03G2215/0827—Augers
    • G03G2215/083—Augers with two opposed pitches on one shaft

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image fixing unit which can form excellent images. <P>SOLUTION: The fixing unit has an elastic component 2b arranged on the outside of the shaft 2a, a heater roller 2 arranged outside this elastic component and containing a cylindrical metal conductor layer 2c, a pressure roller 3 pressed to the heater roller by a pressing mechanism 4, and a drive mechanism 50 to turn the heater roller by giving a torque to the metal conductor layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、用紙上の現像剤像を定着させる定着装置、特に、誘導加熱方法を利用する定着装置に関する。   The present invention relates to a fixing device that fixes a developer image on a sheet, and more particularly, to a fixing device that uses an induction heating method.

デジタル技術を利用した画像形成装置たとえば電子複写機は、加熱により溶融された現像剤像を圧力を加えることで用紙に定着させる定着装置を有している。   An image forming apparatus using digital technology, such as an electronic copying machine, has a fixing device that fixes a developer image melted by heating to a sheet by applying pressure.

定着装置は、現像剤例えばトナーを溶融させる加熱ローラと、この加熱ローラに所定の圧力を提供する加圧ローラとを備え、加熱ローラと加圧ローラとの接触領域（ニップ部）には所定の接触幅（ニップ幅）が形成される。このニップ部を通過する用紙には、加熱ローラからの熱によって溶かされた用紙上の現像剤像が、加圧ローラからの圧力により定着する。そして近年、加熱ローラの外側に薄膜の金属導電層を形成し、この金属導電層を誘導加熱を利用して発熱させる誘導動加熱装置が利用されている。   The fixing device includes a heating roller that melts a developer, for example, toner, and a pressure roller that provides a predetermined pressure to the heating roller. A predetermined area is provided in a contact area (nip portion) between the heating roller and the pressure roller. A contact width (nip width) is formed. On the sheet passing through the nip portion, the developer image on the sheet melted by the heat from the heating roller is fixed by the pressure from the pressure roller. In recent years, an induction dynamic heating apparatus has been used in which a thin metal conductive layer is formed on the outside of the heating roller and the metal conductive layer generates heat using induction heating.

例えば、カラー画像を形成するための定着装置においては、モノクロのそれに比べてより多くの接触幅を確保するため、誘導加熱に利用される金属導電層とシャフトの間に弾性体層を配置し、十分にニップ幅を確保するものが知られている。   For example, in a fixing device for forming a color image, an elastic layer is disposed between a metal conductive layer used for induction heating and a shaft in order to secure a larger contact width than that of a monochrome image, One that sufficiently secures the nip width is known.

しかし、このように、弾性体層を介して、シャフトからの駆動力を金属導電層に伝達する場合、弾性体層がねじれてしまい、シャフトの回転と金属導電層の回転とが同期しない問題があった。
この発明は以上の点に鑑みなされたもので、その目的は、良好な画像形成を実現できる定着装置を提供することにある。 However, as described above, when the driving force from the shaft is transmitted to the metal conductive layer through the elastic layer, the elastic layer is twisted, and the rotation of the shaft and the rotation of the metal conductive layer are not synchronized. there were.
The present invention has been made in view of the above points, and an object thereof is to provide a fixing device capable of realizing good image formation.

本発明の態様に係る定着装置は、
軸部材の外側に配置されている弾性部材と、この弾性部材の外側に配置され、円筒状に形成されている金属導電層とを含む加熱ローラと、
加圧機構により前記加熱ローラに押し当てられている加圧ローラと、
前記金属導電層に回転力を与え、前記加熱ローラを回転させる駆動機構とを備えている。 A fixing device according to an aspect of the present invention includes:
A heating roller including an elastic member disposed outside the shaft member, and a metal conductive layer disposed outside the elastic member and formed in a cylindrical shape;
A pressure roller pressed against the heating roller by a pressure mechanism;
A driving mechanism that applies a rotational force to the metal conductive layer and rotates the heating roller.

この発明によれば、良好な画像形成を実現できる定着装置を提供することができる。   According to the present invention, it is possible to provide a fixing device capable of realizing good image formation.

以下、図面を参照してこの発明の実施の形態について詳細に説明する。
図１は、本発明に係る定着装置１の一例を示す。
図１に示すように、定着装置１は、用紙Ｑ上のトナーＴを加熱する加熱部材（加熱ローラ）２と、加熱ローラ１に所定の圧力を与える加圧部材（加圧ローラ）３と、駆動機構５０を有する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a fixing device 1 according to the present invention.
As shown in FIG. 1, the fixing device 1 includes a heating member (heating roller) 2 that heats the toner T on the paper Q, a pressure member (pressure roller) 3 that applies a predetermined pressure to the heating roller 1, A drive mechanism 50 is included.

加熱ローラ２は、定着装置１の所定の位置で固定され、軸部材２ａと、この周りに配置される第1の弾性層（以下弾性部材と記す）２ｂと、金属導電層２ｃと、第２の弾性層２ｄと、離型層２ｅとを有し、駆動機構５０により矢印ＣＷ方向に回転される。   The heating roller 2 is fixed at a predetermined position of the fixing device 1, and includes a shaft member 2a, a first elastic layer (hereinafter referred to as an elastic member) 2b disposed around the shaft member 2a, a metal conductive layer 2c, and a second member. The elastic layer 2d and the release layer 2e are rotated by the drive mechanism 50 in the direction of arrow CW.

加圧ローラ３は、軸部材３ａと、この外側に配置される弾性部材（例えばシリコンゴム）３ｂと、離型層（例えばフッ素ゴム）３ｃを含む。加圧機構（圧力提供機構）４は、この軸部材３ａと接続されている軸受け部材４ａを介して、加圧スプリング４ｂにより、加圧ローラ３を加熱ローラ２に向かって押し当てている。これにより、加熱ローラ２と加圧ローラ３の接触部には、用紙Ｐの搬送方向に一定以上の幅（ニップ幅）を有するニップ部が形成される。加圧ローラ３は、加熱ローラ２の回転に伴い、矢印ＣＣＷ方向に回転される。   The pressure roller 3 includes a shaft member 3a, an elastic member (for example, silicon rubber) 3b disposed outside the shaft member 3a, and a release layer (for example, fluorine rubber) 3c. The pressure mechanism (pressure providing mechanism) 4 presses the pressure roller 3 toward the heating roller 2 by a pressure spring 4b through a bearing member 4a connected to the shaft member 3a. As a result, a nip portion having a certain width (nip width) in the conveyance direction of the paper P is formed at the contact portion between the heating roller 2 and the pressure roller 3. The pressure roller 3 is rotated in the arrow CCW direction as the heating roller 2 rotates.

加熱ローラ２の周囲には、加熱ローラ２と加圧ローラ３とのニップ部から回転方向の下流側に、用紙Ｑを加熱ローラ２から剥離するための剥離用ブレード５と、励磁コイル６ａを含み、加熱ローラ２の金属導電層２ｃに所定の磁界を提供する誘導加熱装置６と、加熱ローラ２に付着するオフセットされたトナーや紙粉等のゴミを除去するためのクリーニング部材７とが、回転方向順に設けられている。また、加熱ローラ２の長手方向には、加熱ローラ２の温度を検出するサーミスタ８と、加熱ローラ２の表面温度の異常を検知して加熱ローラ２を加熱させるための電力の供給を停止させるサーモスタッド９が配置されている。なお、サーミスタ８は、加熱ローラ２の長手方向に複数設けられることが好ましく、サーモスタッド９は、加熱ローラ２の長手方向に少なくとも１つ以上設けられることが好ましい。   Around the heating roller 2, a peeling blade 5 for peeling the paper Q from the heating roller 2 and an exciting coil 6 a are provided downstream of the nip portion between the heating roller 2 and the pressure roller 3 in the rotation direction. An induction heating device 6 that provides a predetermined magnetic field to the metal conductive layer 2c of the heating roller 2 and a cleaning member 7 for removing dust such as offset toner and paper dust adhering to the heating roller 2 are rotated. They are provided in order of direction. Further, in the longitudinal direction of the heating roller 2, a thermistor 8 that detects the temperature of the heating roller 2 and a thermo stud that detects an abnormality in the surface temperature of the heating roller 2 and stops supplying power for heating the heating roller 2. 9 is arranged. A plurality of thermistors 8 are preferably provided in the longitudinal direction of the heating roller 2, and at least one thermo stud 9 is preferably provided in the longitudinal direction of the heating roller 2.

加圧ローラ３の周囲には、用紙Ｑを加圧ローラ３から剥離するための剥離用ブレード１０と、加圧ローラ３に付着するトナーを除去するためのクリーニング部材１１が配置されている。   Around the pressure roller 3, a peeling blade 10 for peeling the paper Q from the pressure roller 3 and a cleaning member 11 for removing toner adhering to the pressure roller 3 are arranged.

図示しない励磁回路（インバータ回路）から、誘導加熱装置６の励磁コイル６ａに高周波電流が提供されると、励磁コイル６ａから所定の磁界が発生され、加熱ローラ２の金属導電層２ｃに渦電流が流れる。すると、金属導電層２ｃの抵抗にジュール熱が発生し、加熱ローラ２は発熱する。すなわち、加熱ローラ２は、誘導加熱装置６により誘導加熱される。   When a high frequency current is provided from an excitation circuit (inverter circuit) not shown to the excitation coil 6a of the induction heating device 6, a predetermined magnetic field is generated from the excitation coil 6a, and an eddy current is generated in the metal conductive layer 2c of the heating roller 2. Flowing. Then, Joule heat is generated in the resistance of the metal conductive layer 2c, and the heating roller 2 generates heat. That is, the heating roller 2 is induction heated by the induction heating device 6.

この加熱ローラ２からの熱により溶融されたトナーＴは、トナーＴが付着している用紙Ｑが加熱ローラ２と加圧ローラ３とのニップ部を通過して、加圧ローラ３により所定の圧力が加えられることで、用紙Ｑに定着される。   The toner T melted by the heat from the heating roller 2 passes through the nip portion between the heating roller 2 and the pressure roller 3 through the sheet Q on which the toner T is adhered, and the pressure roller 3 applies a predetermined pressure. Is added to the paper Q.

このように、本発明の定着装置は、誘導加熱を利用して、加熱ローラ２の外周面に形成される金属導電層２ｃを発熱させるため、熱損失が少なく、エネルギー効率がよく、加熱ローラ２を短時間で一定の温度まで昇温できる。   Thus, the fixing device of the present invention uses induction heating to generate heat in the metal conductive layer 2c formed on the outer peripheral surface of the heating roller 2, so that there is little heat loss and high energy efficiency. Can be raised to a certain temperature in a short time.

本実施の形態においては、弾性部材２ｂは、例えばシリコンゴム等を発泡させた発泡ゴムにより構成されている。また、金属導電層２ｃは、厚さ０．５〜２ｍｍ程度のアルミニウム、ニッケルあるいは鉄等により構成され、第２の弾性層２ｄは、厚さ数μｍ程度の例えばシリコンを含有する耐熱接着剤により構成され、金属導電層２ｃと離型層との密着強度を高めるため機能を有し、離型層２ｅは、最外周部分に厚さ３０μｍ程度で形成され、フッ素樹脂（ＰＦＡまたはＰＴＦＥ（ポリ四フッ化エチレン）、もしくはＰＦＡとＰＴＦＥの混合物）により構成されている。   In the present embodiment, the elastic member 2b is made of foamed rubber obtained by foaming silicon rubber or the like, for example. The metal conductive layer 2c is made of aluminum, nickel, iron, or the like having a thickness of about 0.5 to 2 mm, and the second elastic layer 2d is made of a heat-resistant adhesive containing, for example, silicon having a thickness of about several μm. And has a function to increase the adhesion strength between the metal conductive layer 2c and the release layer. The release layer 2e is formed at the outermost peripheral portion with a thickness of about 30 μm, and is made of fluororesin (PFA or PTFE (polytetrafluoroethylene). Ethylene fluoride) or a mixture of PFA and PTFE).

次に、図２を用いて、図１に示した加熱ローラ２に適用される弾性部材の一例について説明する。図２は、本実施の形態に適用可能な加熱ローラ２の一部を示す概略図である。
図２に示す通り、弾性部材２ｂは、最小外径ｒ１を有する中央部２１ｂと、中央部２１ｂの両側に位置され最大外径ｒ２を有する端部２２ｂ，２３ｂを含む。 Next, an example of an elastic member applied to the heating roller 2 shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a schematic view showing a part of the heating roller 2 applicable to the present embodiment.
As shown in FIG. 2, the elastic member 2b includes a central portion 21b having a minimum outer diameter r1, and end portions 22b and 23b having both sides of the central portion 21b and having a maximum outer diameter r2.

中央部２１ｂは、軸方向に長さＤ１、厚さｒ３に形成されている。端部２２ｂ，２３ｂは、軸方向に長さＤ２、厚さｒ４に形成されている。また、弾性部材２ｂは、軸方向に一定の外径を有する軸部材２ａの上に形成されている。このため、中央部２１ｂの厚さｒ３は、端部２２ｂ，２３ｂの厚さｒ４よりも薄く、端部２２ｂ，２３ｂの厚さｒ４は、中央部２１ｂの厚さｒ３よりも厚い。   The central portion 21b is formed with a length D1 and a thickness r3 in the axial direction. The end portions 22b and 23b are formed to have a length D2 and a thickness r4 in the axial direction. The elastic member 2b is formed on a shaft member 2a having a constant outer diameter in the axial direction. For this reason, the thickness r3 of the central portion 21b is thinner than the thickness r4 of the end portions 22b and 23b, and the thickness r4 of the end portions 22b and 23b is thicker than the thickness r3 of the central portion 21b.

この構成により、加熱ローラ２は、中央部２１ｂに対応する部分において、良好な画像形成のためのニップ幅を確保することができ、良好な画像形成が実現される。また、弾性部材２ｂは、金属導電層２ｃに比べて熱膨張率が高いため、加熱ローラ２が加熱されることにより弾性部材２ｂが金属導電層２ｃを内側から押し上げ、加熱ローラ２の硬度が変化し、十分なニップ幅を確保できない虞がある。しかし、上述のような構成にすることにより、加熱ローラ２が硬くなりすぎることが回避され、十分なニップ幅を確保することができる。   With this configuration, the heating roller 2 can secure a nip width for good image formation at a portion corresponding to the central portion 21b, and good image formation is realized. Further, since the elastic member 2b has a higher coefficient of thermal expansion than the metal conductive layer 2c, the elastic member 2b pushes up the metal conductive layer 2c from the inside when the heating roller 2 is heated, and the hardness of the heating roller 2 changes. However, a sufficient nip width may not be ensured. However, with the configuration as described above, the heating roller 2 is prevented from becoming too hard, and a sufficient nip width can be ensured.

なお、本実施の形態にかかる軸方向に異なる外径を有する弾性部材２ｂは、U.S.Patent Application No.10/886,703 filed July 9,2004,に開示されている全ての内容が参照され、組み込まれる（弾性層１ｂは、U.S.Patent Application No.10/886,703 filed July 9,2004,に開示されている全ての内容が参照され、組み込まれる。）。   The elastic member 2b having different outer diameters in the axial direction according to the present embodiment is incorporated with reference to all the contents disclosed in US Patent Application No. 10 / 886,703 filed July 9,2004 ( The elastic layer 1b is incorporated with reference to all contents disclosed in US Patent Application No. 10 / 886,703 filed July 9,2004.)

（第１の実施の形態）
次に、図１に示した定着装置に利用可能な加熱ローラ２、加圧ローラ３および駆動機構５０の一例について説明する。 (First embodiment)
Next, an example of the heating roller 2, the pressure roller 3, and the driving mechanism 50 that can be used in the fixing device shown in FIG. 1 will be described.

図３に示す通り、加熱ローラ２は、両端が弾性部材２ｂよりも軸方向に突出している突出部２０１を備えている。本実施の形態において、突出部２０１は、金属導電層２ｃおよび第２の弾性層２ｄにより構成されている。なお、加熱ローラ２は、弾性部材２ｂの両端よりも内側に、加熱ローラ２と加圧ローラ３との間を搬送される用紙Ｑが通過する領域として定義される通紙領域を含み、突出部２０１は、通紙領域の両端に形成されている非通紙領域に配置されている。また、通紙領域は、弾性部材２ｂの中央部２１ｂに対応した領域であって、中央部２１ｂと端部２２ｂ，２３ｂとの境界が非通紙領域に配置されていることが好ましい。   As shown in FIG. 3, the heating roller 2 includes projecting portions 201 whose both ends project more in the axial direction than the elastic member 2b. In the present embodiment, the protruding portion 201 is composed of the metal conductive layer 2c and the second elastic layer 2d. The heating roller 2 includes a sheet passing area defined as an area through which the sheet Q conveyed between the heating roller 2 and the pressure roller 3 passes inside both ends of the elastic member 2b, and includes a protruding portion. Reference numeral 201 denotes a non-sheet passing area formed at both ends of the sheet passing area. The paper passing area is an area corresponding to the central portion 21b of the elastic member 2b, and the boundary between the central portion 21b and the end portions 22b and 23b is preferably disposed in the non-paper passing area.

駆動機構５０は、金属導電層２ｃの突出部２０１の内側に配置されている第１の部材５１と、加熱ローラ２の突出部２０１の外側に配置されている第２の部材５２と、第２の部材５２と接続され、第２の部材５２に回転力を提供する駆動モータ（駆動部）５５とを含む。   The drive mechanism 50 includes a first member 51 disposed inside the protruding portion 201 of the metal conductive layer 2c, a second member 52 disposed outside the protruding portion 201 of the heating roller 2, and a second member And a drive motor (drive unit) 55 that is connected to the second member 52 and provides a rotational force to the second member 52.

第１の部材５１および第２の部材５２は、駆動モータ５５からの回転力により、ねじれて変形しない材質により構成されている。
第２の部材５２は、加熱ローラ２の軸方向と概ね平行に配置されている軸部材５３に固定され、軸部材５３を介して加圧部材５４により加熱ローラ２に対して所定の圧力で接触している。すなわち、第２の部材５２は、加熱ローラ２の金属導電層２ｃを介して、第１の部材５１に対して押し付けられている。これにより、金属導電層２ｃは、第１の部材５１および第２の部材５２により挟まれ、保持されている。 The first member 51 and the second member 52 are made of a material that is not twisted and deformed by the rotational force from the drive motor 55.
The second member 52 is fixed to a shaft member 53 disposed substantially parallel to the axial direction of the heating roller 2, and contacts the heating roller 2 with a predetermined pressure by the pressure member 54 via the shaft member 53. is doing. That is, the second member 52 is pressed against the first member 51 via the metal conductive layer 2 c of the heating roller 2. Thereby, the metal conductive layer 2 c is sandwiched and held between the first member 51 and the second member 52.

駆動モータ５５は、ワンウェイクラッチ（駆動力伝達部）５６を介して、第２の部材５２の軸部材５３の一方端に配置されているギアと、加圧ローラ３の軸部材３ａの一方端に配置されているギアと連結されている。なお、ここで言うワンウェイクラッチとは、単一の駆動モータ５５からの駆動力を、異なる部材に伝達することができる駆動力伝達機構である。よって、第２の部材５２に提供される駆動力、つまり加熱ローラ２に提供される駆動力と、加圧ローラ３に提供される駆動力とを同期させることができる。   The drive motor 55 is connected to a gear disposed at one end of the shaft member 53 of the second member 52 and one end of the shaft member 3 a of the pressure roller 3 via a one-way clutch (driving force transmission unit) 56. It is connected with the arranged gear. The one-way clutch referred to here is a driving force transmission mechanism that can transmit the driving force from the single driving motor 55 to different members. Therefore, the driving force provided to the second member 52, that is, the driving force provided to the heating roller 2, and the driving force provided to the pressure roller 3 can be synchronized.

この構成により、第２の部材５２は、駆動モータ５５からの駆動力を金属導電層２ｃに伝達することができる。すなわち、加熱ローラ２は、第２の部材５２の回転に従って回転し、駆動モータ５５からの回転力（例えば回転数）に対応した動力が金属導電層２ｃに伝達されることにより、駆動モータ５５に対応した回転をすることができる。
従って、本実施の形態にかかる定着装置は、加熱ローラ２の外周面の速度を正確にコントロールすることができるため、良好な画像形成を実現することができる。 With this configuration, the second member 52 can transmit the driving force from the driving motor 55 to the metal conductive layer 2c. That is, the heating roller 2 rotates according to the rotation of the second member 52, and the power corresponding to the rotational force (for example, the number of rotations) from the drive motor 55 is transmitted to the metal conductive layer 2 c, so that the drive motor 55 Corresponding rotation is possible.
Therefore, since the fixing device according to the present embodiment can accurately control the speed of the outer peripheral surface of the heating roller 2, good image formation can be realized.

なお、ワンウェイクラッチ５６を介して加圧ローラ３に提供されている駆動モータ５５からの駆動力は、加熱ローラ２の従動により回転している加圧ローラ３の回転遅れを防止するための補助的なものであって、本発明はこれに限られず、加圧ローラ３には、駆動モータ５５からの動力は伝達されない構成であってもよい。   The driving force from the drive motor 55 provided to the pressure roller 3 through the one-way clutch 56 is an auxiliary for preventing the rotation delay of the pressure roller 3 rotating by the follower of the heating roller 2. However, the present invention is not limited to this, and the power from the drive motor 55 may not be transmitted to the pressure roller 3.

また、図３に示した例においては、第１の部材５１と弾性部材２ｂは、所定の間隔をあけて配置されているが、本発明はこれに限られず、間隔はなくてもよい。さらに、第１の部材５１は、弾性部材２ｂ（すなわち、加熱ローラ２の内側）の空気が通気する通気口５１ａを備えていることが好ましい。これにより、弾性部材２ｂが含んでいる空気が加熱ローラ２の発熱により熱膨張した場合であっても、通気口５１ａを介して外部に排出されるため、加熱ローラ２が硬くなりすぎることを防止することができる。これにより、十分なニップ幅を確保することができるため、良好が画像形成を実現することができる。   In the example shown in FIG. 3, the first member 51 and the elastic member 2 b are arranged with a predetermined interval, but the present invention is not limited to this, and there may be no interval. Furthermore, it is preferable that the first member 51 includes a vent 51a through which air in the elastic member 2b (that is, the inside of the heating roller 2) is vented. Thereby, even when the air contained in the elastic member 2b is thermally expanded due to the heat generated by the heating roller 2, the heating roller 2 is prevented from becoming too hard because it is discharged outside through the vent 51a. can do. As a result, a sufficient nip width can be ensured, and good image formation can be realized.

また、ねじれのない部材により加熱ローラ２の駆動機構５０（第１の部材５１および第２の部材５２）を構成することにより、加熱ローラ２の軸方向の回転を均一にすることができるため、部分的な寄りが防止され、金属導電層２ｃのライフが延命される。ちなみに、この寄りにより、金属導電層２ｃが破損する虞がある。   In addition, since the drive mechanism 50 (the first member 51 and the second member 52) of the heating roller 2 is configured by a member that is not twisted, the axial rotation of the heating roller 2 can be made uniform. Partial shift is prevented, and the life of the metal conductive layer 2c is prolonged. Incidentally, there is a possibility that the metal conductive layer 2c is damaged by this shift.

さらに、この構成により、加熱ローラ２の外周面に駆動モータ５５からの動力を正確に伝達することができるため、加熱ローラ２と加圧ローラ３との間に滑りが生じる事態を回避することができる。   Further, with this configuration, the power from the drive motor 55 can be accurately transmitted to the outer peripheral surface of the heating roller 2, so that it is possible to avoid a situation in which a slip occurs between the heating roller 2 and the pressure roller 3. it can.

（第２の実施の形態）
次に、図１に示した定着装置に利用可能な加熱ローラ、加圧ローラおよび駆動機構の他の例について説明する。 (Second Embodiment)
Next, other examples of the heating roller, the pressure roller, and the driving mechanism that can be used in the fixing device shown in FIG. 1 will be described.

図４に示す通り、本実施の形態にかかる定着装置は、加熱ローラ２１１、加圧ローラ３および駆動機構５１１を含む。なお、加圧ローラ３や他の構成は図１および図２を用いた説明と同様であるため省略する。   As shown in FIG. 4, the fixing device according to the present embodiment includes a heating roller 211, a pressure roller 3, and a drive mechanism 511. The pressure roller 3 and other configurations are the same as those described with reference to FIGS.

加熱ローラ２１１は、軸部材２１１ａと、この周りに配置される弾性部材２１１ｂと、金属導電層２１１ｃと、第２の弾性層２１１ｄと、離型層（図示せず）とを有する。加熱ローラ２１１は、両端の非通知領域に弾性部材２１１ｂよりも軸方向に突出している突出部２１２を備えている。本実施の形態において、突出部２１２は、金属導電層２１１ｃおよび第２の弾性層２１１ｄにより構成されている。   The heating roller 211 includes a shaft member 211a, an elastic member 211b disposed around the shaft member 211a, a metal conductive layer 211c, a second elastic layer 211d, and a release layer (not shown). The heating roller 211 includes protruding portions 212 that protrude in the axial direction from the elastic member 211b in the non-notification regions at both ends. In the present embodiment, the projecting portion 212 is constituted by a metal conductive layer 211c and a second elastic layer 211d.

駆動機構５１１は、金属導電層２１１ｃの突出部２１２の内側に配置され、加熱ローラ２の軸部材２１１ａおよび金属導電層２１１ｃを保持している保持部５１２と、加熱ローラ２の軸部材２１１ａと接続され、保持部材５１２を介して金属導電層２１１ｃに回転力を提供する駆動モータ５１３とを含む。   The drive mechanism 511 is disposed inside the protruding portion 212 of the metal conductive layer 211c, and is connected to the shaft member 211a of the heating roller 2 and the holding portion 512 that holds the metal conductive layer 211c, and the shaft member 211a of the heating roller 2. And a drive motor 513 that provides a rotational force to the metal conductive layer 211c through the holding member 512.

保持部材５１２は、駆動モータ５５からの回転力により、ねじれて変形しない材質（たとえば樹脂等）により構成されている。
駆動モータ５１３は、ワンウェイクラッチ５１４を介して、加熱ローラ２１１の軸部材２１１ａの一方端に配置されているギアと、加圧ローラ３の軸部材３ａの一方端に配置されているギアと連結されている。よって、加熱ローラ２の軸部材２１１ａに提供される駆動力と、保持部材５１２を介して金属導電層２１１ｃに提供される駆動力と、加圧ローラ３に提供される駆動力とを、同期させることができる。 The holding member 512 is made of a material (for example, resin) that is not twisted and deformed by the rotational force from the drive motor 55.
The drive motor 513 is connected to a gear disposed at one end of the shaft member 211a of the heating roller 211 and a gear disposed at one end of the shaft member 3a of the pressure roller 3 via the one-way clutch 514. ing. Therefore, the driving force provided to the shaft member 211a of the heating roller 2, the driving force provided to the metal conductive layer 211c via the holding member 512, and the driving force provided to the pressure roller 3 are synchronized. be able to.

この構成により、保持部材５１２は、駆動モータ５１１からの駆動力を金属導電層２１１ｃに伝達することができる。よって、金属導電層２１１ｃは、駆動モータ５１１からの回転力（例えば回転数）に対応した回転をすることができる。   With this configuration, the holding member 512 can transmit the driving force from the driving motor 511 to the metal conductive layer 211c. Therefore, the metal conductive layer 211c can rotate corresponding to the rotational force (for example, the number of rotations) from the drive motor 511.

従って、加熱ローラ２１１の外周面の速度を正確にコントロールすることができるため、良好な画像形成を実現することができる。また、加熱ローラ２１１の外周面に駆動モータ５１３からの動力を正確に伝達することができるため、加熱ローラ２１１と加圧ローラ３との間に滑りが生じる事態や、駆動モータ５１３の回転数と異なる回転数で加熱ローラ２１１が回転する事態を回避することができる。   Therefore, since the speed of the outer peripheral surface of the heating roller 211 can be accurately controlled, good image formation can be realized. In addition, since the power from the drive motor 513 can be accurately transmitted to the outer peripheral surface of the heating roller 211, a situation in which slip occurs between the heating roller 211 and the pressure roller 3, and the number of rotations of the drive motor 513, A situation in which the heating roller 211 rotates at different rotational speeds can be avoided.

また、図４に示した例においては、保持部材５１２と弾性部材２１１ｂは、所定の間隔をあけて配置されているが、本発明はこれに限られず、間隔はなくてもよい。さらに、保持部材５１２は、弾性部材２１１ｂ（すなわち、加熱ローラ２の内側）の空気が通気する通気口５１２ａを備えていることが好ましい。   In the example shown in FIG. 4, the holding member 512 and the elastic member 211 b are arranged with a predetermined interval, but the present invention is not limited to this, and there may be no interval. Further, the holding member 512 preferably includes a vent 512a through which air in the elastic member 211b (that is, inside the heating roller 2) is vented.

（第３の実施の形態）
次に、図１に示した定着装置に利用可能な加熱ローラ、加圧ローラおよび駆動機構の他の例について説明する。 (Third embodiment)
Next, other examples of the heating roller, the pressure roller, and the driving mechanism that can be used in the fixing device shown in FIG. 1 will be described.

図５に示す通り、本実施の形態にかかる定着装置は、加熱ローラ２２１、加圧ローラ３および駆動機構５２１を含む。なお、加圧ローラ３や他の構成は図１及び図２を用いた説明と同様であるため省略する。   As shown in FIG. 5, the fixing device according to the present embodiment includes a heating roller 221, a pressure roller 3, and a drive mechanism 521. Note that the pressure roller 3 and other configurations are the same as those described with reference to FIGS.

加熱ローラ２２１は、軸部材２２１ａと、この周りに配置される弾性部材２２１ｂと、金属導電層２２１ｃと、第２の弾性層２２１ｄと、離型層２２１ｅとを有する。弾性部材２２１ｂ、金属導電層２２１ｃ、および第２の弾性層２２１ｄは、軸方向に同じ長さを有し、離型層２２１ｅは、第２の弾性層２２１ｂよりも軸方向に対して内側に短い長さを有する。言い換えると、離型層２２１ｅは、後に説明する駆動機構５２１の第１の部材５２２が配置される領域よりも内側に配置される。   The heating roller 221 includes a shaft member 221a, an elastic member 221b disposed around the shaft member 221a, a metal conductive layer 221c, a second elastic layer 221d, and a release layer 221e. The elastic member 221b, the metal conductive layer 221c, and the second elastic layer 221d have the same length in the axial direction, and the release layer 221e is shorter inward in the axial direction than the second elastic layer 221b. Has a length. In other words, the release layer 221e is disposed inside the region where the first member 522 of the drive mechanism 521 described later is disposed.

加圧ローラ３は、加熱ローラ２２１の軸方向の長さＨ１よりも長い長さＨ２を有する。
駆動機構５２１は、加熱ローラ２１１の両端部であって、上述の通り、離型層２２１ｅが形成されていない第２の弾性層２２１ｄの外側に配置されている第１の部材５２２と、加熱ローラ２２１の軸方向と概ね平行に回転可能に保持され、第１の部材５２２が固定されている軸部材５２３と、この軸部材５２３と接続され、第１の部材５２２に回転力を提供する駆動モータ５２４とを含む。 The pressure roller 3 has a length H2 that is longer than the length H1 of the heating roller 221 in the axial direction.
The drive mechanism 521 is a first member 522 disposed at both ends of the heating roller 211 and outside the second elastic layer 221d where the release layer 221e is not formed as described above, and the heating roller A shaft member 523 that is rotatably held substantially parallel to the axial direction of 221 and to which the first member 522 is fixed, and a drive motor that is connected to the shaft member 523 and provides a rotational force to the first member 522. 524.

第１の部材５２２は、上述の第１の部材５１および第２の部材５２同様に、駆動モータ５２４からの回転力により、ねじれて変形しない材質（たとえば樹脂等）により構成されている。   Similar to the first member 51 and the second member 52 described above, the first member 522 is made of a material (for example, resin) that is not twisted and deformed by the rotational force from the drive motor 524.

駆動モータ５２４は、ワンウェイクラッチ５２５を介して、第１の部材５２２の軸部材５２３の一方端に配置されているギアと、加圧ローラ３の軸部材３ａの一方端に配置されているギアと連結されている。よって、第１の部材５２２に提供される駆動力、つまり加熱ローラ２２１に提供される駆動力と、加圧ローラ３に提供される駆動力を同期させることができる。   The drive motor 524 includes a gear disposed at one end of the shaft member 523 of the first member 522 and a gear disposed at one end of the shaft member 3a of the pressure roller 3 via the one-way clutch 525. It is connected. Therefore, the driving force provided to the first member 522, that is, the driving force provided to the heating roller 221 and the driving force provided to the pressure roller 3 can be synchronized.

この構成により、第１の部材５２２は、離型層２２１ｅが形成されていない領域において加熱ローラ２２１と接触し、加熱ローラ２２１の外側から回転力を提供することができる。このため、第１の部材５２２と加熱ローラ２２１との間に滑りが生じる事態を回避することができる。従って、第１の部材５２２は、駆動モータ５２４からの駆動力を金属導電層２２１ｃに伝達することができる。
従って、加熱ローラ２２１の外周面の速度を正確にコントロールすることができるため、良好な画像形成を実現することができる。 With this configuration, the first member 522 can contact the heating roller 221 in a region where the release layer 221e is not formed, and can provide a rotational force from the outside of the heating roller 221. For this reason, it is possible to avoid a situation in which slip occurs between the first member 522 and the heating roller 221. Therefore, the first member 522 can transmit the driving force from the driving motor 524 to the metal conductive layer 221c.
Therefore, since the speed of the outer peripheral surface of the heating roller 221 can be accurately controlled, good image formation can be realized.

（第４の実施の形態）
次に、図１に示した定着装置に利用可能な加熱ローラ、加圧ローラおよび駆動機構の他の例について説明する。 (Fourth embodiment)
Next, other examples of the heating roller, the pressure roller, and the driving mechanism that can be used in the fixing device shown in FIG. 1 will be described.

図６に示す通り、本実施の形態にかかる定着装置は、加熱ローラ２３１、加圧ローラ３および駆動機構５３１を含む。なお、加圧ローラ３や他の構成は図１および図２を用いた説明と同様であるため省略する。   As shown in FIG. 6, the fixing device according to the present embodiment includes a heating roller 231, a pressure roller 3, and a drive mechanism 531. The pressure roller 3 and other configurations are the same as those described with reference to FIGS.

加熱ローラ２３１は、軸部材２３１ａと、この周りに配置される弾性部材２３１ｂと、金属導電層２３１ｃと、第２の弾性層２３１ｄと、離型層（図示せず）とを有する。加熱ローラ２３１は、両端の非通知領域に弾性部材２３１ｂよりも軸方向に突出している突出部２３２を備えている。本実施の形態において、突出部２３２は、金属導電層２３１ｃおよび第２の弾性層２３１ｄにより構成されている。   The heating roller 231 includes a shaft member 231a, an elastic member 231b disposed around the shaft member 231a, a metal conductive layer 231c, a second elastic layer 231d, and a release layer (not shown). The heating roller 231 includes protrusions 232 that protrude in the axial direction from the elastic member 231b in the non-notification regions at both ends. In the present embodiment, the protruding portion 232 is constituted by a metal conductive layer 231c and a second elastic layer 231d.

駆動機構５３１は、加熱ローラ２３１の両端に配置されている突出部２３２の内側に固定されている第１のギア５３２と、第１のギア５３２と噛み合わされて金属導電層２３１ｃに回転力を与える第２のギア５３３と、第２のギア５３３と接続され金属導電層２３１ｃに回転力を提供する駆動モータ５３４を含む。   The drive mechanism 531 is engaged with the first gear 532 fixed to the inside of the protrusions 232 disposed at both ends of the heating roller 231 and the first gear 532 to apply a rotational force to the metal conductive layer 231c. A second gear 533 and a drive motor 534 connected to the second gear 533 and providing a rotational force to the metal conductive layer 231c are included.

詳細に説明すると、図７に示す通り、第１のギア５３２は、内周側に複数の内歯を有するリング状のギアであって、外周面が加熱ローラ２の突出部２３２の内周面に固定されている。第２のギア５３３は、第１のギア５３２と噛み合う複数の外歯を外周側に備え、中心に回転軸５３３ａを有し、回転軸５３３ａは所定の位置に回転可能に保持されている。なお第１のギア５３２および第２のギア５３３は、駆動モータ５３４からの回転力により、ねじれて変形しない材質（たとえば樹脂等）により構成されている。   More specifically, as shown in FIG. 7, the first gear 532 is a ring-shaped gear having a plurality of internal teeth on the inner peripheral side, and the outer peripheral surface is the inner peripheral surface of the protruding portion 232 of the heating roller 2. It is fixed to. The second gear 533 includes a plurality of external teeth meshing with the first gear 532 on the outer peripheral side, has a rotation shaft 533a at the center, and the rotation shaft 533a is rotatably held at a predetermined position. The first gear 532 and the second gear 533 are made of a material (for example, resin) that is not twisted and deformed by the rotational force from the drive motor 534.

駆動モータ５３４は、ワンウェイクラッチ５３５を介して、一方の第２のギア５３３の回転軸５３３ａの端に配置されているギアと、加圧ローラ３の軸部材３ａの一方端に配置されているギアと連結されている。よって、第２のギア５３３に提供する駆動力、すなわち加熱ローラ２３１に提供される駆動力と、加圧ローラ３に提供される駆動力を同期させることができる。   The drive motor 534 has a gear disposed at one end of the rotation shaft 533a of one second gear 533 and a gear disposed at one end of the shaft member 3a of the pressure roller 3 via the one-way clutch 535. It is connected with. Therefore, the driving force provided to the second gear 533, that is, the driving force provided to the heating roller 231 and the driving force provided to the pressure roller 3 can be synchronized.

この構成により、第１のギア５３２および第２のギア５３３は、駆動モータ５３４からの駆動力を金属導電層２３１ｃに伝達されることができる。よって、金属導電層２３１ｃは、駆動モータ５３４からの回転力（例えば回転数）に対応した回転をすることができる。   With this configuration, the first gear 532 and the second gear 533 can transmit the driving force from the driving motor 534 to the metal conductive layer 231c. Therefore, the metal conductive layer 231c can rotate corresponding to the rotational force (for example, the rotational speed) from the drive motor 534.

従って、加熱ローラ２３１の外周面の速度を正確にコントロールすることができるため、良好な画像形成を実現することができる。また、加熱ローラ２３１の外周面に駆動モータ５３４からの動力を正確に伝達することができるため、加熱ローラ２３１と加圧ローラ３との間に滑りが生じる事態を回避することができる。
また、図４に示した例においては、第１のギア５３２および第２のギア５３３は、所定の間隔をあけて配置されているが、本発明はこれに限られず、間隔はなくてもよい。 Therefore, since the speed of the outer peripheral surface of the heating roller 231 can be accurately controlled, good image formation can be realized. Moreover, since the power from the drive motor 534 can be accurately transmitted to the outer peripheral surface of the heating roller 231, it is possible to avoid a situation in which a slip occurs between the heating roller 231 and the pressure roller 3.
In the example shown in FIG. 4, the first gear 532 and the second gear 533 are arranged with a predetermined interval, but the present invention is not limited to this, and there may be no interval. .

本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。   The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

例えば、ワンウェイクラッチを介して加圧ローラ３に提供されている駆動モータからの駆動力は、加熱ローラ２の従動により回転している加圧ローラ３の回転遅れを防止するための補助的なものであって、本発明はこれに限られず、加圧ローラ３には、駆動モータからの動力は伝達されない構成であってもよい。   For example, the driving force from the driving motor provided to the pressure roller 3 via the one-way clutch is an auxiliary one for preventing the rotation delay of the pressure roller 3 rotating by the follower of the heating roller 2. However, the present invention is not limited to this, and the pressure roller 3 may be configured such that power from the drive motor is not transmitted.

また、上述の通り、図２に示すような中央部２１ｂの外径が端部２２ｂ、２３ｂの外径よりも小さい弾性部材２ｂを加熱ローラ２に適用することで、金属導電層２ｃと弾性部材２ｂの熱膨張係数が異なることに起因する加熱ローラ２の硬度変化を低減することができる。このため、加熱ローラ２は、加圧ローラ３との間に、良好な画像形成のためのニップ幅を形成することができる柔らかさを確保することができる。   Further, as described above, the metal conductive layer 2c and the elastic member can be obtained by applying to the heating roller 2 the elastic member 2b whose outer diameter of the central portion 21b is smaller than the outer diameter of the end portions 22b and 23b as shown in FIG. It is possible to reduce a change in the hardness of the heating roller 2 due to the difference in thermal expansion coefficient of 2b. For this reason, the heating roller 2 can ensure softness that can form a nip width for good image formation with the pressure roller 3.

このような構成において、上述の実施の形態にかかる定着装置は、加熱ローラ２の柔らかさを維持しつつ、加熱ローラ２の外周面の速度を正確にコントロールすることができるため、良好な画像形成を実現することができる。   In such a configuration, the fixing device according to the above-described embodiment can accurately control the speed of the outer peripheral surface of the heating roller 2 while maintaining the softness of the heating roller 2, so that good image formation is possible. Can be realized.

すなわち、上述の実施の形態にかかる定着装置のような、加熱ローラ２の金属導電層２ｃを介して加熱ローラ２を回転させる構成を有する駆動機構５０を適用することにより、図２に示すような弾性部材２ｂはもちろん、軸方向に均一の外径を有する弾性部材や、その他、ニップ幅を確保するため、ある程度の柔軟性を有する部材（回転によるねじれ変形をする部材）あるいは空隙を金属導電層の内側に備える加熱ローラに対して効果的である。   That is, by applying a driving mechanism 50 having a configuration in which the heating roller 2 is rotated via the metal conductive layer 2c of the heating roller 2 as in the fixing device according to the above-described embodiment, as shown in FIG. In addition to the elastic member 2b, an elastic member having a uniform outer diameter in the axial direction, other members having a certain degree of flexibility (members that undergo torsional deformation due to rotation), or voids are provided in the metal conductive layer in order to ensure a nip width. It is effective with respect to the heating roller provided inside.

この発明の定着装置の一例を示す概略図。1 is a schematic diagram illustrating an example of a fixing device of the present invention. 図１に示した加熱ローラの一例を示す概略図。Schematic which shows an example of the heating roller shown in FIG. 図１に示した定着装置にかかる第１の実施の形態について説明する概略図。FIG. 2 is a schematic diagram for explaining a first embodiment of the fixing device shown in FIG. 1. 図１に示した定着装置にかかる第２の実施の形態について説明する概略図。FIG. 3 is a schematic diagram illustrating a second embodiment of the fixing device illustrated in FIG. 1. 図１に示した定着装置にかかる第３の実施の形態について説明する概略図。FIG. 4 is a schematic diagram illustrating a third embodiment of the fixing device illustrated in FIG. 1. 図１に示した定着装置にかかる第４の実施の形態について説明する概略図Schematic explaining the fourth embodiment of the fixing device shown in FIG. 図６に示した加熱ローラの軸方向から見た概略図。Schematic seen from the axial direction of the heating roller shown in FIG.

符号の説明Explanation of symbols

１…定着装置、２…加熱ローラ（加熱部材）、２ａ…軸部材、２ｂ…弾性部材（弾性層）、２ｃ…金属導電層、２ｄ…第２の弾性層、２ｅ…離型層、３…加圧ローラ（加圧部材）、３ａ…軸部材、３ｂ…弾性部材、３ｃ…離型層、４…加圧機構、４ａ…軸受け部材、４ｂ…加圧スプリング、５…剥離用ブレード、６…誘導加熱装置、６ａ…励磁コイル、７…クリーニング部材、８…サーミスタ、９…サーモスタッド、１０…剥離用ブレード、１１…クリーニング部材、２１ｂ…中央部、２２ｂ，２３ｂ…端部、５０…駆動機構、５１…第１の部材、５１ａ…通気口、５２…第２の部材、５３…軸部材、５４…加圧部材、５５…駆動モータ、５６…ワンウェイクラッチ、２０１…突出部、２１１…加熱ローラ、２１１ａ…軸部材、２１１ｂ…弾性部材、２１１ｃ…金属導電層、２１１ｄ…第２の弾性層、２１２…突出部、２２１…加熱ローラ、２２１ａ…軸部材、２２１ｂ…弾性部材（弾性層）、２２１ｃ…金属導電層、２２１ｄ…第２の弾性層、２２１ｅ…離型層、２３１…加熱ローラ、２３１ａ…軸部材、２３１ｂ…弾性部材、２３１ｃ…金属導電層、２３１ｄ…第２の弾性層、２３２…突出部、５１１…駆動機構（駆動モータ）、５１２…保持部材、５１２ａ…通気口、５１３…駆動モータ、５１４…ワンウェイクラッチ、５２１…駆動機構、５２２…第１の部材、５２３…軸部材、５２４…駆動モータ、５２５…ワンウェイクラッチ、５３１…駆動機構、５３２…第１のギア、５３３…第２のギア、５３３ａ…回転軸、５３４…駆動モータ、５３５…ワンウェイクラッチ。   DESCRIPTION OF SYMBOLS 1 ... Fixing device, 2 ... Heating roller (heating member), 2a ... Shaft member, 2b ... Elastic member (elastic layer), 2c ... Metal conductive layer, 2d ... Second elastic layer, 2e ... Release layer, 3 ... Pressure roller (pressure member), 3a ... shaft member, 3b ... elastic member, 3c ... release layer, 4 ... pressure mechanism, 4a ... bearing member, 4b ... pressure spring, 5 ... peeling blade, 6 ... Induction heating device, 6a ... excitation coil, 7 ... cleaning member, 8 ... thermistor, 9 ... therm stud, 10 ... peeling blade, 11 ... cleaning member, 21b ... center, 22b, 23b ... end, 50 ... drive mechanism, DESCRIPTION OF SYMBOLS 51 ... 1st member, 51a ... Vent, 52 ... 2nd member, 53 ... Shaft member, 54 ... Pressure member, 55 ... Drive motor, 56 ... One-way clutch, 201 ... Projection part, 211 ... Heating roller, 211a ... shaft member, 211b ... bullet Member 211c ... Metal conductive layer 211d Second elastic layer 212 ... Projection 221 Heating roller 221a Shaft member 221b Elastic member (elastic layer) 221c Metal conductive layer 221d Second 221e ... release roller, 231 ... heating roller, 231a ... shaft member, 231b ... elastic member, 231c ... metal conductive layer, 231d ... second elastic layer, 232 ... protrusion, 511 ... drive mechanism (drive) Motor) 512 ... holding member, 512a ... vent, 513 ... drive motor, 514 ... one-way clutch, 521 ... drive mechanism, 522 ... first member, 523 ... shaft member, 524 ... drive motor, 525 ... one-way clutch, 531: Drive mechanism, 532: First gear, 533: Second gear, 533a: Rotating shaft, 534: Drive motor, 535: One-way clutch.

Claims (14)

軸部材の外側に配置されている弾性部材と、この弾性部材の外側に配置され、円筒状に形成されている金属導電層とを含む加熱ローラと、
加圧機構により前記加熱ローラに押し当てられている加圧ローラと、
前記金属導電層に回転力を与え、前記加熱ローラを回転させる駆動機構とを備えている定着装置。 A heating roller including an elastic member disposed outside the shaft member, and a metal conductive layer disposed outside the elastic member and formed in a cylindrical shape;
A pressure roller pressed against the heating roller by a pressure mechanism;
And a driving mechanism that applies a rotational force to the metal conductive layer and rotates the heating roller. 前記加熱ローラの前記金属導電層は、両端に、前記弾性部材よりも軸方向に突出した突出部を備え、
前記駆動機構は、前記金属導電層の突出部の内側に配置される第１の部材と、前記金属導電層の突出部の外側に配置され、前記第１の部材の反対側から前記金属導電層の突出部を挟み、前記金属導電層に回転力を与える第２の部材と、前記第２の部材と接続され前記第２の部材に動力を提供する駆動部とを含んでいる請求項１に記載の定着装置。 The metal conductive layer of the heating roller includes, at both ends, protrusions that protrude in the axial direction from the elastic member,
The drive mechanism is disposed on the inner side of the protruding portion of the metal conductive layer and on the outer side of the protruding portion of the metal conductive layer, and the metal conductive layer is disposed from the opposite side of the first member. 2. A second member for applying a rotational force to the metal conductive layer and a drive unit connected to the second member and providing power to the second member. The fixing device described. 前記加圧ローラは、前記駆動部と接続されている軸部材を含み、前記第２の部材と同じ回転が与えられる請求項２に記載の定着装置。   The fixing device according to claim 2, wherein the pressure roller includes a shaft member connected to the driving unit, and is given the same rotation as the second member. 前記第２の部材および前記加圧ローラは、駆動力伝達機構を介して前記駆動部と接続され、前記駆動部からの駆動力が提供される請求項３に記載の定着装置。   The fixing device according to claim 3, wherein the second member and the pressure roller are connected to the driving unit via a driving force transmission mechanism and are provided with driving force from the driving unit. 前記加熱ローラは、軸方向の中央に配置されている通紙領域と、この通紙領域の両端に配置されている非通紙領域とを含み、少なくとも前記通紙領域における外周面上に離型層を備え、
前記駆動機構は、前記加熱ローラの前記非通紙領域と接触し、前記金属導電層に回転力を与える第１の部材と、前記第１の部材と接続され前記第１の部材に動力を提供する駆動部とを含み、
前記離型層は、前記第１の部材と前記加熱ローラ２とが接触する領域には形成されていない請求項１に記載の定着装置。 The heating roller includes a sheet passing area disposed in the center in the axial direction and a non-sheet passing area disposed at both ends of the sheet passing area, and is released on at least an outer peripheral surface of the sheet passing area. With layers,
The drive mechanism is in contact with the non-sheet passing area of the heating roller and provides a power to the first member connected to the first member and a first member that applies a rotational force to the metal conductive layer. Including a drive unit,
The fixing device according to claim 1, wherein the release layer is not formed in a region where the first member and the heating roller 2 are in contact with each other. 前記加圧ローラは、前記駆動部と接続されている軸部材を含み、前記第１の部材と同じ回転が与えられる請求項５に記載の定着装置。   The fixing device according to claim 5, wherein the pressure roller includes a shaft member connected to the driving unit, and is given the same rotation as the first member. 前記第１の部材および前記加圧ローラは、駆動力伝達機構を介して前記駆動部と接続され、前記駆動部からの駆動力が提供される請求項６に記載の定着装置。   The fixing device according to claim 6, wherein the first member and the pressure roller are connected to the driving unit via a driving force transmission mechanism and are provided with a driving force from the driving unit. 前記加熱ローラの前記金属導電層は、両端に、前記弾性部材よりも軸方向に突出した突出部を備え、
前記駆動機構は、前記金属導電層の突出部の内側と固定されている第１のギア部材と、前記第１のギア部材と噛み合わされて前記金属導電層に回転力を与える第２のギア部材と、前記第２のギア部材と接続され前記第２のギア部材に動力を提供する駆動部とを含んでいる請求項１に記載の定着装置。 The metal conductive layer of the heating roller includes, at both ends, protrusions that protrude in the axial direction from the elastic member,
The drive mechanism includes a first gear member fixed to the inside of the protruding portion of the metal conductive layer, and a second gear member that meshes with the first gear member and applies a rotational force to the metal conductive layer. The fixing device according to claim 1, further comprising: a drive unit that is connected to the second gear member and provides power to the second gear member. 前記加圧ローラは、前記駆動部と接続されている軸部材を含み、前記第２のギア部材と同じ回転が与えられる請求項８に記載の定着装置。   The fixing device according to claim 8, wherein the pressure roller includes a shaft member connected to the drive unit, and is given the same rotation as the second gear member. 前記第２のギア部材および前記加圧ローラは、駆動力伝達機構を介して前記駆動部と接続され、前記駆動部からの駆動力が提供される請求項９に記載の定着装置。   The fixing device according to claim 9, wherein the second gear member and the pressure roller are connected to the driving unit via a driving force transmission mechanism and are provided with driving force from the driving unit. 前記加熱ローラの前記金属導電層は、両端に、前記弾性部材よりも軸方向に突出した突出部を備え、
前記駆動機構は、前記加熱ローラの前記弾性部材の内側に配置されている軸部材と接続され、加熱ローラに回転力を与える駆動部と、前記金属導電層の突出部の内側に配置され、前記金属導電層および前記加熱ローラの軸部材を保持する保持部材とを含んでいる請求項１に記載の定着装置。 The metal conductive layer of the heating roller includes, at both ends, protrusions that protrude in the axial direction from the elastic member,
The drive mechanism is connected to a shaft member disposed on the inner side of the elastic member of the heating roller, and is disposed on the inner side of a driving unit that applies a rotational force to the heating roller, and a protruding portion of the metal conductive layer, The fixing device according to claim 1, further comprising a metal conductive layer and a holding member that holds a shaft member of the heating roller. 前記加圧ローラは、前記駆動部と接続されている軸部材を含み、前記加熱ローラと同じ回転が与えられている請求項１１に記載の定着装置。   The fixing device according to claim 11, wherein the pressure roller includes a shaft member connected to the driving unit, and is given the same rotation as the heating roller. 前記加熱ローラの軸部材および前記加圧ローラは、駆動力伝達機構を介して前記駆動部と接続され、前記駆動部からの駆動力が提供される請求項１２に記載の定着装置。   The fixing device according to claim 12, wherein the shaft member of the heating roller and the pressure roller are connected to the driving unit via a driving force transmission mechanism and are provided with driving force from the driving unit. 前記弾性部材は、最小外径を有する中央部と、前記中央部の両側に配置され最大外径を有する端部とを含んでいる請求項１に記載の定着装置。   2. The fixing device according to claim 1, wherein the elastic member includes a central portion having a minimum outer diameter and end portions disposed on both sides of the central portion and having a maximum outer diameter.
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CN101067737A (en) 2007-11-07
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CN101067737B (en) 2010-12-01

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